Former NFL running back Leroy Hoard discusses coping with headaches, memory loss and depression and explains why he must never forget Andre Waters, Dave Duerson and Junior Seau, three former NFL players who committed suicide.

The NFL retirement board determined in 1999 that repeated blows to the head had left Mike Webster, who spent most of his 17-year career with the Pittsburgh Steelers, "totally and permanently" disabled.

For years while the NFL's top medical experts denied any link between football and long-term brain damage, the league retirement board awarded disability payments to at least three former players after concluding that football caused their brain inju